Abstract
When the eggs of human Ascaris and hookworm are ingested by adult dung beetles they are usually destroyed or damaged. The experilmental results reported separately (Miller et al, 1961) indicate that helminth eggs in fecal food are destroyed by the action of the mouth parts of Canthon and Phanaeus, since they rarely appeared at any level of the digestive tract unless they were artificially introduced past the mlouth parts by injection. Pinoti,s, oni the other hand, swallowed many eggs which survived, although a high percentage were daiiaged. The mouth parts and digestive tract of COathon lCaeis (1)rury), Phianaes igne1s MacL., and Pinoturs carolinlls (Linn.) were studied conlparatively to determine the mechanism of these effects. The three species are essentially alike in the form and function of these organs.
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